Improvement in reciprocating pumps



UNITED STATES PATENT OFFICE.

D. M. WESTON, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN RECIPROCATING PUMPS.

Specification forming part of Letters Patent No. 56,129, dated July 3,1866.

To all whom it may concern:

Be it known that I, DAVID M. WEs'IoN, of Boston, in the county ofSuffolk and Commonwealth of Massachusetts, have invented a new anduseful Improvement in Reciprocating Pumps 5 and Ido hereby declare thatthe followin g is a full and exact description thereof, reference beinghad to the accompanying drawings, and to the letters of reference markedthereon. f

To enable others skilled in theart to make and use my invention, I willproceed to describe its construction and operation.

In reciprocating pumps as at present constructed, with each stroke ofthe piston the piston-head strikes the water or other fluid to be pumpedwith a sensible jar or concussion, commonly called the water-hammer,77which increases with the speedot` the pump actions, so that a rapidaction of the pump is destructive to the machinery.

In my invention I overcome this difficulty b v attaching springs, madeof cylindrical rings of rubber or other elastic material, to the endofthe piston-rod, and as part of the connection between the piston-rodand the drivinggear.

Upon the accompanying drawings, Figure l is a plan of the upper surfaceof the crosshead. Fig. 2 is a plan of the lower surface of thecross-head. Fig. 3 is a front elevation of my invention. Fig. 4 is asection of the same.

Upon the connecting-rod P, I place the metal anges A A, the loweriianges resting upon a shoulder in the connecting-rod P, the upperconned and adjusted in its position by two nuts, the upper of which is abinding-nut. Between these flanges are placed rubber rings O O, oneabove and one below the cross-head B. The cross head is made to titloosely upon the piston-rod P, between the two cushions or springs C C,which,being of an elastic material, relieve the driving-gear from anyjar or concussion in the action ofthe pump.

I do not confine myself to rubber springs or cushions, for other elasticmaterial may be used, nor to any particular location between the drivingmachinery and the pump-piston.

Iclaim- The cushions or springs C O, made of.' rubber or other elasticmaterial, or their equivalents, so placed as to form part of theconnection between the piston of a.pump and the drivinggear,substantially as above described, for the purpose of relieving the pumpand machinery from jar or concussion.

D. M. WESTON.

Witnesses:

AUGUSTUS Ross, B. ROGER.

